This lightweight, minimal retainer comes with a sliding, removable bead to adjust tension and fit. The grippy silicone ends latch on to most-size temple ends and is UV and corrosion resistant so you know it won't fail throughout all of your adventures Fit & Design: Fits all frame sizes- thin reader frames up to chunky sunglasses! Removable bead adjusts tension for superb fit Hand wash with mild soap / Rinse thoroughly Length: 19.5"